谢谢各位了,错误如下,就是不知道哪里有问题? java.lang.NullPointerException at aiismg.jcmppapi.cmppclass.SendCMPPPacket(cmppclass.java:442) at aiismg.jcmppapi.cmppclass.Submit(cmppclass.java:612) at aiismg.jcmppapi.CMPPAPI.CMPPSendSingle(CMPPAPI.java:268) at bean.Send.setSend(Send.java:127) at _0002fQuickSendSubmit_0002ejspQuickSendSubmit_jsp_46._jspService(_000 2fQuickSendSubmit_0002ejspQuickSendSubmit_jsp_46.java:200) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:126) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.jasper.runtime.JspServlet$JspServletWrapper.service(JspSer vlet.java:174) at org.apache.jasper.runtime.JspServlet.serviceJspFile(JspServlet.java:2 61) at org.apache.jasper.runtime.JspServlet.service(JspServlet.java:369) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.tomcat.core.ServletWrapper.handleRequest(ServletWrapper.ja va:503) at org.apache.tomcat.core.ContextManager.service(ContextManager.java:559 ) at org.apache.tomcat.service.http.HttpConnectionHandler.processConnectio n(HttpConnectionHandler.java:160) at org.apache.tomcat.service.TcpConnectionThread.run(SimpleTcpEndpoint.j ava:338) at java.lang.Thread.run(Thread.java:536)
有些人自己定义的exception不一定用到e.setMessage()的,那样你用getMessage()就看不到了
java.lang.NullPointerException
at aiismg.jcmppapi.cmppclass.SendCMPPPacket(cmppclass.java:442)
at aiismg.jcmppapi.cmppclass.Submit(cmppclass.java:612)
at aiismg.jcmppapi.CMPPAPI.CMPPSendSingle(CMPPAPI.java:268)
at bean.Send.setSend(Send.java:127)
at _0002fQuickSendSubmit_0002ejspQuickSendSubmit_jsp_46._jspService(_000
2fQuickSendSubmit_0002ejspQuickSendSubmit_jsp_46.java:200)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:126)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.jasper.runtime.JspServlet$JspServletWrapper.service(JspSer
vlet.java:174)
at org.apache.jasper.runtime.JspServlet.serviceJspFile(JspServlet.java:2
61)
at org.apache.jasper.runtime.JspServlet.service(JspServlet.java:369)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.tomcat.core.ServletWrapper.handleRequest(ServletWrapper.ja
va:503)
at org.apache.tomcat.core.ContextManager.service(ContextManager.java:559
)
at org.apache.tomcat.service.http.HttpConnectionHandler.processConnectio
n(HttpConnectionHandler.java:160)
at org.apache.tomcat.service.TcpConnectionThread.run(SimpleTcpEndpoint.j
ava:338)
at java.lang.Thread.run(Thread.java:536)
令人奇怪的是这个空指针问题出现在jsp调用javabean上,而且是双数刷新的时候报错,单数就通过
如:第一次运行jsp页...ok,第二次报错...依此类推,实在找不到错误
我用jdk1.4怎么不出现这种问题.